<!DOCTYPE HTML>
<html>

<head>
  <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
  <title>document.write</title>
  <script type="text/javascript">
    var mystr = "我是";
    var mychar = "JavaScript";
    document.write(mychar);
    document.write(mystr + mychar + "的忠实粉丝")
  </script>
</head>

<body>
</body>

</html>